I don't think love negotiation ever works. That's when two people agree on how they want or expect the relationship to go ahead of time, at the start of the relationship. They both say things like, "I want an honest relationship." So they agree to always tell each other the truth. Or, "We should always agree to work things out without judging each other" or some such agreement.
This just never works. Somehow one person doesn't stick to the agreement. What people agree they "should" do is never what happens. Or something happens to one of them that they did not foresee. Or one person interprets "honesty" differently than the other person. Relationships are always full of the unexpected.